Go to edit back in stock config. Scroll to bottom of Settings tab and look for Tags Filtering.
You can use tags to filter products eligible for back-in-stock widgets display.
From Settings > Filtering
, specify tags to whitelist or blacklist.
- If tags whitelist is used, back-in-stock widgets will only be shown if any of product tags matches specified tags.
- If tags blacklist is used, back-in-stock widgets will not be shown if any of product tags matches specified tags.